Question

Theorem: If the diagonals of a parallelogram are congruent, then each angle of the parallelogram is a right angle.

Kim is writing the proof of the theorem using the properties of a parallelogram shown below.

• The opposite sides of a parallelogram are parallel.
• The opposite sides of a parallelogram are congruent.



She proved the theorem by showing that triangle ADC is congruent to triangle CBA using the _________ Postulate.

Be sure to type your postulate using its acronym. For example: AAS, SAS, SSS, ASA, or CPCTC.

Answer 1

its either sss or sas
help please

Answer 2

Opposite sides are congruent. That gives 2 sides congruent.
The diagonals are congruent. That gives a 3rd side congruent. It that SSS or SAS?

Answer 3

sss